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Patented Mar. 2, 1886.

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E. W. & J. SNOW. COMBINED BOOK COVER AND REMOVABLE LEAF UNITED STATESPATENT @FFICE.

ELMEB \V. SNOW AND JAMES FRANK SNOXV, OF PAWTUCKET, RHODE ISLAND.

COMBINED BOOK-COVER AND REMOVABLE LEAF.

EPECEFECATION forming part of Letters Patent No, 337,027, dated March 2,1886;

Application filed December 17, 1884, Serial No. 150,598. (No model.)

United States, residing at Pawtucket, in the.

county of Providence, in the State of Rhode Island, have invented a newand useful Combined Book- Cover and Removable Leaf, of

which the following is a specification.

.Our invention relates to an adjustable petty ledger in which thebill-heads or leaves are inserted separately or alternated with a seriesof index-leaves; and it consists in a flexiblebacked cover, a series ofleaves open-slotted at their sides, a rigid back-piece havinginwardly-bent arms adapted to engage with the slots in the leaves, and alocking device, substantially as described, the whole combined in themanner and for the purpose stated.

The accompanying drawings form a part of this specification.

Figure l is a perspective view. Fig. 2 is a perspective view of thecover, the leaves and rigid back-support being removed. Fig. 3 is a topplan of the rigid back-piece. Fig. 4 is a front elevation of same withthe locking device. Fig. 5 shows the locking device in detail, and Fig.6 is an elevation on a large scale of a part of the back-piece.

Similar letters of reference denote like parts in all the figures wherethey occur.

A is a rigid back-piece, having its arms A A bent inwardly toward eachother, as shown in Fig. 3, so as to leave intermediate spaces betweenthem and the body of the back-piece. They are provided with the enlargedends A in this instance, for the reception of the locking-bolt B, whichis provided at one of its ends with an elongated head, B, capable ofrotation upon the bolt to lock and unlock the leaves or bill-heads, aswill be more fully explained hereinafter.

0 represents the leaf orbill-head, which is open-slotted on each sideadjacent to its end, so as to form the ears 0 0, adapted as to size andshape to fit into the intermediate spaces formed, as above described, bythe inwardlyturned arms A A and the back piece A, while the arms A Aenter the open side slots of the bill-head, as shown in Fig. 3. Thecover DDhas a flexible back, and is provided with elongated openings dd, corresponding in shape with the head B of the locking-bolt,in orderthat the said heads may pass up through the openings to enable the headsto be turned into the positions indicated by the dotted lines d (linFig. 1, to lock the parts together. The solid lines in Fig. 1 showtheheads B B partly turned after they have been passed through the openingsd d and before they have assumed their final positions at d d forlocking.

It is obvious that instead of the bolt B there can be'used to equaladvantage solid parts A provided at either end with starts or pinions torotate as do the heads on the bolts hereinbefore described, and-alsothat some mechanical equivalent may be used instead of the rotatingheads for locking purposes.

Other modifications may be made in the locking device without departingfrom the principle of our invention. The arms A A may also be bent at anangle less than a right angle, or in a curve relatively to the body ofthe back-piece A, provided the intermediate spaces and the ears 0 c ofthe leaves are made to correspond.

In practical application of our invention the rigid back-piece A issecured to the cover D by the bolts B B passing through the cover at theproper point and then through the enlarged parts A. The bill-heads(having been first side-slotted to formears c c corresponding in shapewith the space between the arms A A and the body Aof the back-piece) arethen placed so that the arms A A will enter the side slots and the ears0 c of the leaves or bill-heads lie in the aforesaid intermediatespaces. The other portion of the cover D is then brought over so thatthe boltheads B B will pass through the elongated to which the heads canbe attached, so as apertures d d, and the heads being turned to thedotted-1ine positions d d, the parts are locked together.

To remove the leaves it is only necessary to rotate the heads B B untilthey coincide with the apertures 01 d, when the top cover can bedetached and the leaves lifted out and others substituted.

\Ve claim as our invention- 1. The combinatiomwith a rigid back-piece,A,havin g arms AA bent inwardlytoward each other to form spaces betweenthem and the shown, a flexible-backed cover, DD, and bolts body of theback-piece, as shown and de- 13 B, provided with rotating heads B B,scribed, of leaves or bill-heads O, open-slotted adapted to rotate tolook and unlock the cover, 15 at the sides to form ears 0 0, aflexible-backed as shown and described. cover, D D, and a lockingdevice, substantially In testimony whereof we have hereunto set asdescribed, for securing the parts together. I our hands, in presence oftwo Witnesses, this 2. The combination of a rigid back-piece, I 13th dayof May, 1884. A, provided with arms A A bent inwardly ELMER W. SNOW.toward each other to form spaces between them JAMES FRANK SNOXV. and thebody of the bnck-pieee,with leaves or bill-heads O, open-slotted at thesides to form ears 0 0 adapted to engage said spaces, as

\Vitnesses:

HENRY MARsH, Jn, CHARLES WILDE HANSON.

